Industrial protecting tubes
omnigrad TA series

C97EV002.CDR

Heavy, medium and light duty
from round/hexagonal bar stock or pipe
threaded, flanged and socket weld-in versions

Threaded and flanged

FROM PIPE

Threaded and flanged

FROM BAR STOCK

Threaded and flanged

C97EV002.CDR

TechnicalInformation
TI138T/02/en

GeneralThe Endress+Hauser thermowell lines
cover a worldwide oriented
measurement problem solving.
To meet customer necessities, including
different technical standards according
to international/country/corporate
requirements, is our commitment.
The designs shown above arerepresentative of the basic styles
available.

Socket weld-in
and flanged weld

Industrial thermowells are made frombar stock and from pipe of different
diameters. The process connection canbe threaded, flanged or socket weld-in.
A variety of thermowell materials isavailable in order to cover a complete
range of applications: heat treating,glass, paper, petroleum, power,
chemical for example.

Endress+Hauser
Nothing beats know-how

General

Thermowell design has a great
importance in obtaining accurate
temperature measurements. Factors as
length, thickness and mass velocity
have to be carefully balanced to
produce adeguate well strength as wellas accuracy and response oftemperature measurement.
Immersion length
The distance from the tip of the well tothe underside of thethread/flange/socket weld-in is theimmersion length. For optimum
accuracy, this length should be longenough to allow the entire temperaturesensitive part of the element to project
into the medium being measured.
For a correct temperature measurement
the thermowell immersion length mustbe 20 times its diameter.
When calculating the immersion length,
the dead length to pass through walls,sockets etc. must also be taken intoaccount.

Loading capacity of wells
In many cases well failures are not due
to the effect of pressure andtemperature only. Inadequate strengthof well can be due to improper choice of
shape or material. Less familiar, andmore dangerous, are the vibration
effects to which wells are subjected.
Fluid, flowing by the well, forms aturbulent wake (called the Von Karmantrail) which has definite frequency
based on the thermowell shape andprocess operating conditions.
The standard DIN43763 as well asASME PTC 19.3 -1974 (ANSI PTC19.3 1974) gives the formulas to enable theuser to determine if a selected well isstrong to withstand specific application
conditions of temperature, pressure,velocity and vibrations.

Identification
Upon request thermowell is suppliedwith punched on identification.

Straight/Conical or Tapered Wells
Tapered shank wells provide greater
strength for the same sensitivity. The
higher strength-to-weight ratio gives
these wells a higher natural frequency
than equivalent length straight/conicalshank wells, permitting operation at
higher fluid velocity.

Test capabilities

Hydrostatic test

Liquid penetrant test and others

E+H and customer reference standards
hydrostatic tests are available "onrequest" (i.e. Dow Chemical, Du Pont,ENI, Esso, Montedison, Shell, etc.).
Two main testing methods, at ambient
temperature, are available with issuingof certificates: internal and externalpressure test.

Additional tests such as liquid penetrant
examination, ultrasonic tests,
radiographic inspection are available
with issuing of inspection test reportcertificate.

Materials

In general, the thermowell material usedis governed mainly by the corrosion
conditions. Occasionally the material
strength rather than the corrosion
resistance determines the thermowellmaterial selection. For this reason wells
are also available in several grades ofstainless steel and carbon steel, Monel,
Hastelloy C and Inconel 600.
The high polish option for all stainlesssteel thermowells provides maximum
corrosion resistance.
Since the various materials specified forthermowells cannot meet therequirements of all possible service
conditions, the material that is best',1GHVFULSWLRQRU',1:1U
EUDQG$16,x5CrNiMo17122

AISI3161.4401x2CrNiMo17132

1.4404AISI316L

x6CrNiMoTi17122

1.4571AISI316Ti

x10CrAl24 (DIN)
x19CrN28 (Euro)1.47491.4762AISI446

10CrMo910
13CrMo44

1.73801.7335-Inconel 600
NiCr15Fe

2.4816

Hastelloy C

2.48197DEOH

suited to the application shall beselected by the user. The thermowellmaterial can be specified according toothers installed plant units.
In the case of corrosive media it isadvisable to establish the suitability of amaterial by testing it under serviceconditions, since often only slight
impurities are sufficient to alter the effectwhich such media may have on thematerial.
For reference guide herein you find atable with the metallurgic characteristics
and the application of the mostcommonly used materials.

0HWDOOXUJLFFKDUDFWHULVWLFV$SSOLFDWLRQ- corrosion resistance- good resistance at very low
temperatures- corrosion resistance- good resistance at very low
temperatures- less sensitization in welded platefabrication in the range 450÷850°C
for short time periods- corrosion resistance- good resistance at very lowtemperatures-less sensitization in welded platefabrication in the range 450÷850°C
for long time periods- corrosion resistance- good resistance at very hightemperatures- better scaling resistanceacetoneasphalt
fatty acids
food & beveragehydrogen peroxide
paper
petroleum processing
petrochemical industries
soaps and detergentssteamsulphurflue smoke gas temperature
petroleum processing
petrochemical industries
sulphur

DIN 43763

exit flues
glass- good resistance in oxidizing andheat treatment
reducing atmospheres
high corrosive environment
UNS N 06600-high corrosion resistance at very
high temperature environment
high temperaturesoxidation and reducing atmospheres
superheaters
waste heat boilers- excellent corrosion resistance inchemical industries aggressive fluids
oxidizing and reducing atmospheres
as Alum (Potassium or Sodium),- corrosion resistance in welded
Calcium Bisulphate, Calcium
UNS N 10276
junctions
Chloride, Chromic Acid, Citric Acid,- excellent resistance to pitting and toCopper Chloride, Ferric Chloride,
stress corrosion cracking
Hydrobromic Acid

Heavy duty

Endress+Hauser offers a complete
range of standardized thermowells.
Heavy duty thermowell line covers avery large amount of industrial
standards as DIN, Dow Chemical,
Du Pont, ENI, ME U, etc.
Two different types of thermowellconstruction are available: from drilled
bar stock and from pipe.
The process connection can bethreaded, flanged or socket weld-in.

Herein you can find a summary
technical description of heavy duty
thermowells (see Technical Informationreferences for more details).

Bar stock thermowells-Female thermometer connection
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30 mm

1/2" NPT

3/4" NPTor flanged

ME U819.02 - type 2

1 1/4" NPTor flanged

Du Pont
TCM-1T; TCM-2T;
TCM-6T; TCM-7T;
TCM-8T

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-42 mm1/2" NPT
1/2" NPSC

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-34 mm1/2" NPT

1" NPTor flanged

ME U819.04 - type 6

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-35 mm3/4" NPT

1" NPTor flanged

ENI BAR 3
ENI BAR 4

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-35 mm1/2" NPT

1" NPTor flanged

ENI BAR 1

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-

48 mm

3/4" NPT

1 1/2" NPTor flanged

ENI MAS 17$-48 mm1/2" NPT

1 1/2" NPTor flanged

ENI MAS 1 special

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27 mm

-

1/2" NPT

3/4" NPT-

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27 mm

-

1/2" NPT
1/2" NPSC

1/2" NPTor 3/4" NPT

Du Pont SR1T
Du Pont SR2T

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36 mm

-

1/2" NPT

1" NPT-

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-

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TaperedConical

Bar stock thermowells - Female thermometer connection
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49 ÷ 35 mm

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34 ÷ 30 mm

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29 ÷ 25 mm

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24 ÷ 20 mm

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1/2" NPT
1/2" NPSM
1/2" BSP
1/2" BSPF
1/2" NPT
1/2" NPSM
1/2" BSP
1/2" BSPF

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Socketweld-inDow Chemical
standard G6D-7001-00(1995)

Socketweld-in-1/2" NPT
1/2" NPSC

Socketweld-in

Du Pont SR21T
Du Pont SR22T

G 3/8"
M14 (x1.5)
M18 (x1.5)

Socketweld-in

DIN 43763-Form D
DIN 43763-D1S type
DIN 43763-D2S type
DIN 43763-D4S type
DIN 43763-D5S type

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M14 (x1.5)

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34 ÷ 30 mm

1/2" NPT
1/2" NPSM

Flangedweld

Dow Chemical
standard G6D-7002-00(1995)

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29 ÷ 25 mm

1/2" NPT
1/2" NPSC

Flangedweld

Du Pont SR6T
Du Pont SR7T

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Welded extension pipe thermowells
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9÷12 mm

G 1/2"1/2" NPTHexagonal
27 mm
wrench1/2" NPT-

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9÷15 mm
1/4"-3/8"

G 1/2"
1/2" NPT

Hexagonal
27 mm
wrench3/4" NPT-

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1/4"-3/8"-1/2"

G 1/2"
1/2" NPT

Hexagonal
36 mm
wrench1" NPT-7$

1/4"-3/8"-1/2"
3/4"-1"

G 1/2"
1/2" NPT

Hexagonal
53 mm
wrench1 1/2" NPT-

1/4"-1/2"-3/4"

1/2" NPT
3/4" NPTRound∅ 35 mm

ENI TUB 1
ENI TUB 2
ENI TUB 3
ENI TUB 4

1/2"-3/4"

1/2" NPT
3/4" NPTG 1/2"
G 3/4"

Roundpipe size

flanged orweldedmountingbushingflanged orweldedmountingbushing

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TaperedConical

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Male

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ME U819.05
9 typeMedium duty

Medium duty thermowell line covers DIN
standards and complete market
requirements.
Thermowells available are made frompipe.
The process connection can bethreaded, flanged or sanitary fittings.
Herein you can find a summary
technical description of medium andlight duty thermowells (see Technical
Information references for more details).

Pipe thermowells-Male thermometer connection
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G1/2"-G1" std DIN
G1/2"-G3/4"-G1"
1/2"-3/4"-1"NPT
M20 (x1.5)-M27 (x2)
M20 (x1.5)- G1/2" std DIN
G1/4"-G3/8"-G1/2"-G3/4"-G1"
1/4"-3/8"-1/2" NPT
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9÷13

M24 (x1.5)
1/2" NPT

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9÷12

M24 (x1.5)
1/2" NPTG 1/2"

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9÷13

M24 (x1.5)
1/2" NPTG 1/2"

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compression fitting-7$

9÷13

M24 (x1.5)
1/2" NPTG 1/2"√flanged

DIN 43763 - Form F

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M24 (x1.5)√wide range of food andsanitary connections

DIN 43763 - Form D

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DIN 43763-Form B
DIN 43763-Form C-

TA series is particularly designed tocomplete E+H line of temperature
sensors which includes EEx-d andheavy duty thermometers (requiring aseparate thermowell).
To easy select the right coupling you
can use the following selection table.

TA series selection
table

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1/2" NPT

1/2" NPT-

1/2" NPTG 1/2"---

1/2" NPT

FemaleFemale

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Female

Male

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-

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1/2" NPT

1/2" NPT

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1/2" NPTG 1/2"

1/2" NPTG 1/2"-

1/2" NPTG 1/2"-1/2" NPT
3/4" NPT-1/2" NPT

1/2" NPT

1/2" NPT
1/2" NPT

3/4" NPT
1/2" NPT
3/4" NPT
1/2" NPT

1/2" NPT

1/2" NPT

1/2" NPT

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Female0RGHO---1/2" NPT-G 1/2"

1/2" NPT

1/2" NPT

1/2" NPT
1/2" NPT

1/2" NPT
1/2" NPT

1/2" NPT

1/2" NPT

1/2" NPT

1/2" NPT--G 3/8"
M14
M18

G 3/8"

1/2" NPT

1/2" NPT

1/2" NPT

1/2" NPT----

1/2" NPT-----

Supplementary
documentation

TA10 thermowell
Technical Information TI151T/02/en
TA11 thermowell
Technical Information TI195T/02/en
TA12 thermowell
Technical Information TI196T/02/en
TA13 thermowell
Technical Information TI238T/02/en
TA14 thermowell
Technical Information TI234T/02/en
TA530 thermowell
Technical Information TI189T/02/en
TA531 thermowell
Technical Information TI192T/02/en
TA532 thermowell
Technical Information TI193T/02/en
TA533 thermowell
Technical Information TI194T/02/en
TA540 thermowell
Technical Information TI166T/02/en
TA541 thermowell
Technical Information TI188T/02/en
TA550 thermowell
Technical Information TI153T/02/en
TA551 thermowell
Technical Information TI237T/02/en
TA555 thermowell
Technical Information TI154T/02/en
TA556 thermowell
Technical Information TI155T/02/en
TA557 thermowell
Technical Information TI156T/02/en

TA558 thermowell
Technical Information TI157T/02/en
TA559 thermowell
Technical Information TI158T/02/en
TA560 thermowell
Technical Information TI159T/02/en
TA561 thermowell
Technical Information TI176T/02/en
TA565 thermowell
Technical Information TI160T/02/enTA566 thermowell
Technical Information TI177T/02/en
TA570 thermowell
Technical Information TI161T/02/en
TA571 thermowell
Technical Information TI178T/02/en
TA572 thermowell
Technical Information TI179T/02/en
TA573 thermowell
Technical Information TI187T/02/en
TA574 thermowell
Technical Information TI207T/02/en
TA575 thermowell
Technical Information TI162T/02/en
TA576 thermowell
Technical Information TI163T/02/en
Welding capabilities
Technical Information TI167T/02/en
Liquid penetrant test
Technical Information TI168T/02/en
Hydrostatic test
Technical Information TI169T/02/en

Export Division
Endress+Hauser
Instruments International
GmbH + Co.
P.O. Box 2222
D-79574 Weil am Rhein
Germany
Tel. (7621) 975-02
Tx 7-73-926
Fax (7621) 9-75-345

Endress+Hauser
1RWKLQJEHDWVNQRZKRZ

03.97/MT

TI138T/02/en/03.97
Printed in Italy